Introduction & Basic Program Structure

Which of the following is a valid C main() declaration?

• main() { ... }

• void main() return 0;

• int main() { return 0; }

• int main;

Every C program must have a main() function.

• True

• False

In C, each statement must end with:

• Colon, :

• Semicolon, ;

• Period, .

• Parentheses, ()

What will the output be?

• gcc.exe: fatal error: no input files

• Hello World

• HelloWorld

• gcc.exe: fatal error: no input files

• "C:\path\to\your\compiler.exe" failed to launch (exit code: 0)

Which format specifier(s) are used for an integer in printf? Select more than one answer (Select all that apply)

• %f

• %d

• %c

• %i

• %s

What will the following code output?

• A

• Hello World

• format '%i' expects argument of type 'int', but argument 2 has type 'char'

• 65

Which of the following is the correct way to read an integer input into variable num?

• scanf("%d", num);

• scanf("%i", &num);

• scanf("%s", &num);

• scanf("%d", &num[]);

What will the following code print?

• 2

• 0

• 2.5

• 10

Which is a valid constant definition in C?

• PI const float = 3.142;

• #define PI = 3.142;

• const PI = 3.142;

• #define PI 3.142

What is the output of the following code?

• 20

• 11 11

• 10 10

• 10 11